Similar to SPMinuteSchedule, there is Hourl Schedule also. Use the one as per your requirement.
Once this much is done, we need to create Feature.xml file for the feature we have built and paste it under the Features Folder (C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\FEATURES). Create a folder named MyTimerFeature and under this folder create Feature.xml with the following content.